Destruction of Welded Metal Structures of Construction Machines Operated in Corrosive Environments

Scherbakov, Alexander; Sklyarova, Anastasiya; Пушкарев, А. Е.; Петров, А. Ф.

doi:10.1007/978-981-16-3844-2_50

Cited by 6 publications

(5 citation statements)

References 6 publications

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“…It should be noted that there was no levelling of the loading surface immediately after loading as the objective was to approximate the experiment as closely as possible to the actual transport of goods. Therefore, only a qualitative assessment of load displacement can be made from the results of load level measurement [11,12,13,14].…”

Section: Resultsmentioning

confidence: 99%

Retracted Article: Effects of bulk cargo displacements on changes in truck axle loads

Scherbakov

Пушкарев²,

Kuzmin³

et al. 2023

E3S Web of Conf.

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Changes in road legislation and trucking regulations have led to the need to take into account the maximum axle loads that arise during road transport. In particular, this task is relevant when transporting bulk cargo because when braking or accelerating trucks (road trains), when driving on a longitudinal gradient, or when driving on curves, there can be a displacement of part of the cargo relative to the axles of the vehicle. In article results of experimental research of displacements of loose cargo (gravel, crushed stone) at transportations and their influence on change of axle loadings of cargo vehicles are resulted. During the research the level of loose cargo in semitrailer truck-trailer before and after the experiment was measured, axle load weighing and full train weight weighing was made, in addition video recording of loose cargo displacement was made. Conducting the analysis of experimental data of axial weighing we found out that during transportation of loose cargo its redistribution inside semi-trailer takes place, and it in its turn leads to change of axle loads of road-train. The axle load variations were outside the measurement error range of 1.4 to 4.9%. A further proof of the shifting of the bulk load in the semi-trailer was the video recording of the load in transit. The analysis of the videos showed that both crushed stone and gravel shifted in the semitrailer when the vehicle was moving at high speed. As a result of this work, an experimental confirmation of the fact that the bulk cargo is shifted relative to the sides of the semi-trailer during braking and this shift leads to changes in the axle loads of trucks was obtained.

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Section: Resultsmentioning

confidence: 99%

Retracted Article: Effects of bulk cargo displacements on changes in truck axle loads

Scherbakov

Пушкарев²,

Kuzmin³

et al. 2023

E3S Web of Conf.

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“…To increase tool life and cost of ownership, methods are being considered to increase material attributes such as static, dynamic, and cyclic load ratings, high ductility, high tensile strength, and toughness, high relaxation resistance, and corrosion resistance. The not less important property of the hydrodynamic oscillation generator metal is its low susceptibility to tempering embrittlement, low critical speed of hardening, high hardenability, low tendency to grain growth, and decarburization in heat treatment [18][19][20][21]. The aim of the research was the modes of heat treatment and their influence on hardness increase.…”

Section: Introductionmentioning

confidence: 99%

Heat treatment effect of 65G and 60C2A steels on strength characteristics of the hydrodynamic oscillator built-in drill head

Петров

Scherbakov

2023

E3S Web of Conf.

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The ways of improving the physical and mechanical properties of the components of a hydromonitor drill head with an integrated generator of hydrodynamic oscillations are reviewed. On the basis of the results of this consideration, an improvement of the working body of the HDD technique is proposed. On the example of 60S2A and 65G steels, the influence of different modes of heat treatment of the improved drilling head on the ultimate strength, relative lengthening, and surface hardness of the detail petal, which is the basic loaded element of the generator of hydrodynamic vibrations, is examined. The analysis of physical and mechanical properties has shown a significant increase of parameters influencing the increase of rigidity properties of the investigated hydrodynamic oscillator part, which allows us to make a conclusion about the effectiveness of its application for the increase of drill bit operational life. An experimental and analytical method was carried out to describe the increase of physical-mechanical properties of the part - petal, which is the main loaded element of the generator of hydrodynamic oscillations. Increase of durability of rock destruction tool for pilot hole laying by increasing of physical-mechanical properties of used material for individual parts of hydrodynamic oscillator.

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“…Исходя из определения эффективности, рассматриваемой ГОСТ Р ИСО 9000-2015 1 как соотношение между достигнутым результатом и использованными ресурсами, следует вывод о том, что своего максимального значения она достигает при работе каждой машины как можно дольше с максимальной производительностью и при минимальных затратах. Существует ряд факторов, приводящих к уменьшению технической производительности ДСМ [1,2,3,4,5,6]:…”

Section: Introductionunclassified

“…Повышение производительности ДСМ может быть достигнуто либо за счет организационных мероприятий (сокращение простоев, улучшение загрузки ДСМ, улучшение организации производства, укрепление трудовой дисциплины, повышение квалификации и культурно-технического уровня машинистов и ИТР), либо путем технического совершенствования машин -их модернизации, компьютеризации работ, расширения наборов сменных рабочих органов, применения адаптирующегося рабочего оборудования и приспособлений, внедрения новых ДСМ для сокращения ручного труда и сбережения ресурсов [1].…”

Section: Introductionunclassified

“…Значительные скачки тягового усилия в процессе работы автогрейдера отсутствуют , в). ение производительности ДСМ может быть достигнуто либо за счет организационных ий (сокращение простоев, улучшение загрузки ДСМ, улучшение организации тва, укрепление трудовой дисциплины, повышение квалификации и культурноого уровня машинистов и ИТР), либо путем технического совершенствования машин -их ции, компьютеризации работ, расширения наборов сменных рабочих органов, я адаптирующегося рабочего оборудования и приспособлений, внедрения новых ДСМ ения ручного труда и сбережения ресурсов [1]. ную роль в оценке прочности рабочего элемента играет величина силы ения копанию Рк, которая складывается из силы сопротивления грунта резанию Рр, ения стружки Рсс и сопротивления перемещению призмы волочения Рпв [7]: Рк=Рр+Рсс+Рпв.…”

Section: Introductionunclassified

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Replacement working body material as a way to increase reliability of road construction machines

2022

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Introduction. On the example of a motor grader knife, ways of increasing the reliability of road construction machines (RCM) operation are evaluated. For this purpose, the analysis of force effects nature on the working body of the RCM is carried out and its design features are highlighted (the presence of a welded joint). Based on the analysis, the range of characteristics necessary for making a decision on the possibility of replacement the material of the RCM working body is determined. Additionally, its thermocyclic treatment (TCT) is carried out. Experimental studies of the effect of this thermal impact type on the structure and properties of steels are described.Materials and methods. With the help of metallographic analysis, the author investigates the influence of the number of thermal effects cycles on the grain size and the complex of various materials physical and mechanical characteristics of road construction machines working body at various stages of the thermocyclic treatment.Results. It is determined that an increase in the level of the investigated steels physical and mechanical characteristics is possible through the use of TCT due to the obtaining of a fine-grained metal structure. The dependences of the main physical and mechanical characteristics of the investigated steels (ultimate strength and yield strength) on the number of thermal effects cycles are considered. Correlation relationships are selected to describe these dependencies. The relationship between the yield strength and ultimate strength of 09G2S and 30MnB5 steels and the grain size is considered. In addition, studies of the steels fatigue characteristics are carried out; data on determining the microhardness are presented for the welded joint. For various operating temperatures, fractographic studies are carried out on samples after cyclic loading.Discussion and conclusion. Based on a comparative analysis of the complex of physical and mechanical characteristics, the author made a conclusion about the possibility of replacing steel 09G2S with steel 30MnB5.

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Destruction of Welded Metal Structures of Construction Machines Operated in Corrosive Environments

Cited by 6 publications

References 6 publications

Retracted Article: Effects of bulk cargo displacements on changes in truck axle loads

Retracted Article: Effects of bulk cargo displacements on changes in truck axle loads

Heat treatment effect of 65G and 60C2A steels on strength characteristics of the hydrodynamic oscillator built-in drill head

Replacement working body material as a way to increase reliability of road construction machines

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